https://docs.pytest.org/en/stable/deprecations.html#setup-teardown

--- tests/alias_dict.py
+++ tests/alias_dict.py
@@ -36,7 +36,7 @@ class AliasDict_:
                 ad.unalias("lol no")
 
     class aliases_of:
-        def setup(self):
+        def setup_method(self):
             self.ad = AliasDict()
 
         def returns_list_of_aliases_for_given_real_key(self):
@@ -162,7 +162,7 @@ class AliasDict_:
     class aliases_are_not_real_keys:
         "aliases are not real keys"
 
-        def setup(self):
+        def setup_method(self):
             self.a = AliasDict({"key1": "val1", "key2": "val2"})
             self.a.alias("myalias", "key1")